.main-content{
 position:absolute;
 top: 50%;
 left: 50%;
 transform: translate(-50%,-50%);
}
.login-cont{
width: 450px;
height: 310px;
background-color: aliceblue;
border-radius: 5px;
}
.back-cont{
    background-image: url(../assets/loginback.jpg);
    background-size: cover;
    background-attachment: fixed;
    background-repeat: no-repeat;
    min-height: 100vh;
}